Conformational stabilization of a β-hairpin through a triazole–tryptophan interaction
作者:Donatella Diana、Claudia Di Salvo、Veronica Celentano、Lucia De Rosa、Alessandra Romanelli、Roberto Fattorusso、Luca D. D'Andrea
DOI:10.1039/c7ob02815f
日期:——
stabilize the β-hairpin conformation are needed as β-hairpin peptides are useful molecules for pharmaceutical, biological and materials applications. We explored the use of a “triazole bridge”, a covalent link between two β-hairpin strands obtained through Cu-catalyzed alkyne–azide cycloaddition, combined with an aromatic–aromatic interaction. Highly conformationally stable peptides were identified
需要稳定β-发夹结构的分子工具,因为β-发夹肽是用于药物,生物学和材料应用的有用分子。我们探索了“三唑桥”的使用,该三唑桥是通过Cu催化的炔-叠氮化物环加成反应与芳香族-芳族相互作用结合而获得的两个β-发夹链之间的共价连接。通过NMR筛选基于Trpzip2支架的少量环状肽,可以鉴定出高度构象稳定的肽。Trpzip2的特征性Trp-Trp相互作用被可变长度的对角三唑桥所取代。NMR和CD分析表明,三唑和吲哚环可以有利地相互作用以稳定β-发夹构象。构象稳定取决于三唑桥的长度和芳环之间的相对位置。结合芳族相互作用和共价链间三唑桥是获得具有高β-发夹含量的肽的有用策略。